Roller-mill



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P. FERRIER.

ROLLER MILL.

110.380,,8'78 Paten'ted Apr. .10, 1888.

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P. PERRIER.

ROLLER MILL.

No. 380,878. Patented Apr. 10, 1888.

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UNlTE TATES PATENT PHILO FERRIER, OF YPSILANTI, MICHIGAN.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 380,878, dated April 10, 1888.

(No model.)

To all whom, it may concern:

Be it known that I, PHILO FERRIER, a citizen of the United States, residing at Ypsilanti, in the county of VVashtenaw and State of Michi gan, have invented certain new and useful 1mprovements in Roller-Mills; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in that class of roller mills which are employed for the reduction of grain or products derived from grain, and has for its object means for enabling the movable roller to return to its proper grinding position when separated from the stationary roll, for the purpose of starting the mill. W' hen the two rollers of a pair are set closely together, as is necessary to effect the reduction of the material, they cannot be started without first separating the rolls. When the rolls have been so separated, it is a matter of some difficulty and requires great care and attention to give them the same adjustment or position which they had before they were separated.

The object of my invention is to obviate said difficulty; and the invention consists in the means employed for separating or spreading the rolls and for returning them to their former set grinding position, and for adjusting said rolls, as hereinafter set forth, and pointed out particularly in the claims.

In the accompanying drawings, Figure 1 is an end View of a roller-mill, partly broken away, embodying my invention. Fig. 2 is a plan view of same, parts being shown in section on dotted line 1 1 of Fig. 1. Fig. 3 is an enlarged detail section taken on dotted line w of Fig. 2. Fig. 4 is a detail in elevation of the cam-shaft.

As indicated in the drawings, F represents the frame of the mill; H, the hopper; H, the housing over the grinding-rolls; and It It are the grinding-rolls, allof which are in common use.

P is a bed-plate, on which I mount the fixed boxes 13 and sliding boxes B. The fixed boxes are secured firmly to the bed-plate and frame by the bolts on. The sliding boxes are held movably by means of the bolts 11., passing through the oblong slots d in the bed plate. The sliding boxes have a horizontal arm, B, with vertical arm N. The vertical arms are provided with an internal screw -threaded sleeve, S, having an annular fiange, t, which bears against the back face of the vertical arms N.

Z is a horizontal rod, of which I employ two to a set of rollers. Said rods are screwthreaded at each end, their outer ends being screwed into the sleeves S. Said rods pass freely through the openings K of the sliding boxes, also through the fixed boxes, to which said rods are adjustably secured by the nuts a a, for purposes hereinafter set forth. 'Each rod Z, vertically below the crushingpoint of the rolls, is provided with a box or journalbearing head, K, in which I journal the ends of the camshaft D. Said cam-shaft has near each end a cam, e, which-cams force the sliding boxes B back. or from the fixed boxes, thereby separating the rolls, inasmuch as the roller R is moved from the roller R. The camshaft D is rocked by raising and lowering the hand-lever S, which is made fast tosaid cam-shaft. Raising said hand-lever separates the roll R from the roll It, and lowering it allows the movable roll R to approach the fixed roll by the means hereinafter set forth.

t t are coiledsprings encircling the rods Z. One end of each spring presses against the movable box B. The other end meets the flanged collar 0, and by the nut a the tension of each spring is regulated. The collar Gand nut to form an adjustable abutment for the coiled spring. On the outer end of each sleeve S is attached firmly a hand-wheel, W, for revolving said sleeve.

The parts are operated as follows: To move the roll R from the roll R, the hand'lever is raised to the dotted position shown at the left of Fig. 1, causing the cams e of the cam-shaft D to force the boxes B back from the fixed boxes 13'. Throwing the hand-lever down to the dotted position shown in said view rocks the cams e from the sliding boxes, when the pressure of the springs 15 will cause the sliding boxes to return, thereby carrying the roller R ICC) back to former grinding position. To adjust or set the roll R at the desired distance from the roll B to obtain the proper reduction of grain, the operator turns the hand-wheels W to the left, revolving the sleeves S, which engagewith the screw-threads upon the rods Z, causing said sleevesto travel outward or from the roller R. The flangest' of the sleeves S engaging with the upright arm N of the movable boxes, will cause said boxes to move outward, thereby drawing the roll It from the roll It. Turning the wheels W in an oppos1te direction will move'the sleeves S toward the roll R, whereby the grinding position of said roll may be made nearer to the roll R.

It will be observed that as the handlever S is raised the cams e on the shaft D will force the roll R back, as before stated, and that as the boxes B are moved back their vertical arms N will slide along the sleeves S, and when the handle S is lowered the springs t force the boxes 13 forward until the roll R reaches its former set or adjusted grinding pos1t1on, when its forward movement will be arrested by the upright arms N striking the annulanflanges z of the sleeves S.

To increase the pressure of the springs t on the roll R, the nuts a are forced against the caps or collars 0, moving them toward the roller and thereby closing the springs t. To decrease the pressure, the nuts a are turnedin an opposite direction, thereby allowing the springs t to expand and decrease in pressure.

As before stated, the rods Z are adjustably attached by nuts a a to the fixed or stationary boxes 13. The object of so attaching said rods is, the cams e on the cam-shaft in using will become worn or shortened, in which case the cam-shaft may be moved toward the slidmg boxes by adjusting the nuts on the rods Z, and still be able to move the rollR the desired distance from the roll R. Again, in using the rolls they become dull and irregular in form, which necessitates a grinding or turning down of the rolls, which turning reduces the circumference of them. This also necessitates the moving of the camshaft, so as to maintain its relative position below the crushing-point of the rolls to properly separate them when stopping the mill, all of which is accomplished by moving the rods Z horizontally by turningthe nuts a a on said rods, causing the bearings K for the camshaft to be moved horizontally to accomplish the object before stated.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an organized roller-mill, the combination of the fixed boxes, the sliding boxes, the rollers journaled therein, the horizontal rods made fast at their inner ends to the fixed boxes and having the journal-bearings K, the camshaftjournaled therein, the cams of said shaft engaging with the sliding boxes, the hand-lever made fastto said camshaft, and the springs mounted on the horizontal rods and having engagement with the sliding boxes, whereby the rolls are retained in an operative position.

2. In combination with the fixed boxes, the sliding boxes, the rolls journaled in said boxes, the horizontal rods adj ustably attached at their inner ends to the fixed boxes and having the journal-bearings K, the cam-shaftjournaled in said bearings, and the hand-lever made fast to the cam-shaft, the cams of said shaft engaging with the sliding boxes, and the coiled springs mounted on the horizontal rods, their inner ends pressing against the sliding boxes and their outer ends provided with ahutments adjustably mounted on the horizontal rods, as and for the purposes specified.

In testimony whereof I affix my signature in presence of two witnesses.

PHILO .FERRIER. I

\Vitnesses:

FRANK JosLYN, T. J. FORSYTH. 

